the fighting moving closer to the assad regime headquarters. this comes as secretary of state hillary clinton today reiterated her warnings to syrian president bashar assad against using chemical weapons. once again, saying it would cross a red line. senior syrian official refused to confirm the existence of the weapons but denied the government is considering using them in the fight, despite intelligence reports to the contrary. >> our concerns are that increasingly desperate assad regime might turn to chemical weapons. or might lose criminal of them to one of the many groups that are now operating within syria. >> groups according to the u.s. intelligence reports that are affiliated with al-qaeda. and are increasingly fighting alongside opposition forces. >> in a sign that president assad is feeling the mounting pressure he has reportedly sent an envoy to several latin american countries including venezuela, cuba and equador, seeking asylum. not on the list is the two biggest military supports, russia and iran. on britain sky news today, assa